the art of having sexual relations where after you give your partner anal sex and notice you have fecal matter on your genetals. Then, you get her attention and slap your penis on her forehead. This should then cause the action of her wiping her head, resembling a salute of some sort.

As I blew my load, I noticed there was some shit on my dick. Jennifer was in for it so I gave her a mexican salute to get back at her.